JPS5855741B2 - Brush with motor anti-vibration rubber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a portion of the vibration isolating rubber 1 with notches, grooves, holes, etc. to form a weak restoring force portion 2 where the elastic restoring force is smaller than that of the other portions. A brush with anti-vibration rubber for a motor, characterized in that the anti-vibration rubber 1 is attached to a brush 4 having a portion 3 with the weak restoring force portion 2 and the bent portion 3 aligned; The object of the present invention is to provide a brush with anti-vibration rubber for a motor in which the brush is less deformed due to the elastic restoring force of the anti-vibration rubber and the anti-vibration rubber is less likely to peel off.

Conventionally, vibration-proof rubber has been pasted on the brush of a small motor such as a micro motor, but when the brush 4 has a bent part 3 as shown in FIG. When the anti-vibration rubber 1 is pasted on the rubber, there is a problem that the elastic restoring force of the anti-vibration rubber 1 causes the brush 4 to deform by △h, resulting in a decrease in dimensional accuracy.In addition, if the adhesive force is weak, the elastic restoring force causes the brush 4 to deform over time. There was a problem that the vibration isolating rubber 1 would peel off.

Furthermore, in order to prevent this, if the anti-vibration rubber 1 is pasted separately on both sides of the brush 4, avoiding the folded part 3 as shown in Fig. 11, there is a problem that the pasting work needs to be done twice. .

The present invention solves these conventional problems.

The present invention will be explained in detail below based on illustrated embodiments. As shown in FIG. 1, the brush 4 has one end connected to a terminal 6 inserted through the bearing stand 5 of the motor A, and a sliding contact portion 7 divided into a plurality of pieces at the other end slidingly contacted with the commutator 8. As shown in FIG. 2, a bent part 3 is formed in the middle part.

The anti-vibration rubber 1 has a flat plate shape as shown in Fig. 3, and has a weak restoring force part 2 in which the intermediate part is cut in the width direction to make the thickness smaller than other parts and reduce the elastic restoring force. It is formed.

Here, the weak restoring force portion 2 may be formed by a notch in the middle portion of the vibration isolating rubber 1 as shown in FIG. 5a, or may be formed by a through hole as shown in the figure.

As shown in FIGS. 2 and 6, the weak restoring force part 2 of the vibration isolating rubber 1 is bent to match the bending part 3 of the brush 4, and the vibration isolating rubber 1 is bonded to the brush 4 in this bent state. Paste it.

The anti-vibration rubber 1 may be attached to the back side of the brush 4 as shown in FIG.

In addition, in the vibration isolating rubber 1 in which the weak restoring force portion 2 of the ■groove is formed as shown in FIG. 7, the groove is bent so as to be narrowed as shown in FIG. Paste it to.

When the anti-vibration rubber 1 is attached to the middle bent part 3 of the brush 4 in this way, the commutator 8 of the brush 4 is
The vibration of the bending portion 3, which has the largest amplitude due to the contact pressure with the vibration damping rubber 1, can be reduced by the vibration isolating rubber 1, and a sufficient vibration damping effect can be obtained.

As described above, the present invention provides a weak restoring force section in the vibration isolating rubber by using notches, grooves, slots, etc., and aligns the bending section of the brush with this weak restoring force section to attach the vibration isolating rubber to the brush. Because it is pasted, the weak restoring force part of the anti-vibration rubber that bends along the bending part of the brush has a weak elastic restoring force, so the bending part does not elastically deform, improving the dimensional accuracy of the brush. can,
In addition, since the anti-vibration rubber is not subject to elastic deformation, it is possible to strongly adhere the anti-vibration rubber to the bent part of the brush, and the anti-vibration rubber can be firmly attached to the brush over a long period of time. It has the advantage of being able to provide sufficient vibration-proofing effects.

In addition, since the anti-vibration rubber can be pasted across the bend, only one piece of anti-vibration rubber needs to be pasted, which reduces the number of man-hours needed for pasting compared to the conventional method of separating the rubber into two parts and pasting the anti-vibration rubber. There is.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the motor, Fig. 2 is a perspective view of one embodiment of the present invention, Fig. 3 is a cross-sectional view of the same vibration isolating rubber, and Fig. 4 is a front view of another embodiment. , Figures 5a and 5b are perspective views of vibration isolating rubber used in other embodiments, Figure 6 is a perspective view of another embodiment, and Figure 7 is a sectional view of vibration isolation rubber used in other embodiments. , FIG. 8 is a perspective view of an embodiment using the same anti-vibration rubber as described above, FIG. 9 is an explanatory view of the operation of the present invention, and FIGS. 10 and 11 are views of conventional examples, respectively. In the figure, 1 is a vibration-proof rubber, 2 is a weak restoring force part, 3 is a bent part, and 4 is a brush.

Claims (1)

[Claims] 1. A part of the anti-vibration rubber is provided with notches, grooves, holes, etc. to form a weak restoring force part where the elastic restoring force is smaller than other parts, and this anti-vibration rubber is attached to a brush having a bent part as described above. A brush with anti-vibration rubber for a motor, characterized in that the weak restoring force part and the bent part are attached and attached in alignment.